technology to deliver traffic information. we get that information from cars, fleet vehicles like ups drivers and taxi cabs and from mobile phones. >> reporter: inrix is predicting the most congestion on thursday and friday afternoon. >> it's going to be tough like monday morning commute. >> reporter: heavy traffic is also expected in marin county between 11:00 a.m. and 6:00 p.m. saturday. many drivers say they will try to avoid the congestion as much as possible. >> for the five days it shut down since i will either be going 92 and go over that bridge which i imagine will be about yeah probably three times as busy as normal. >> reporter: ntc adds if you don't already have one getting ntrax should be easy to help you get around over labor day weekend. cara liu, ktvu news. >>> pedestrians and bicyclists can also use the bay bridge when it opens. for the time being it will only go part way on the span. it is expected at least a year for that bike path to go from oakland to yerba buena. >>> and at ktvu.com you will find an extensive section on the bridge and the routs to get around the closure.